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Mark Salyzyn0175b072014-02-26 09:50:16 -08001/*
2 * Copyright (C) 2012-2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _LOGD_LOG_BUFFER_ELEMENT_H__
18#define _LOGD_LOG_BUFFER_ELEMENT_H__
19
Mark Salyzynf7c0f752015-03-03 13:39:37 -080020#include <stdatomic.h>
Mark Salyzynab0dcf62015-03-16 12:04:09 -070021#include <stdlib.h>
Mark Salyzyn97c1c2b2015-03-10 13:51:35 -070022#include <sys/types.h>
23
Mark Salyzyn0175b072014-02-26 09:50:16 -080024#include <sysutils/SocketClient.h>
25#include <log/log.h>
26#include <log/log_read.h>
27
Mark Salyzyn08739ba2015-03-16 08:26:05 -070028namespace android {
29
30// Furnished in main.cpp. Caller must own and free returned value
31// This function is designed for a single caller and is NOT thread-safe
32char *uidToName(uid_t uid);
33
34}
35
Mark Salyzyn0175b072014-02-26 09:50:16 -080036class LogBufferElement {
37 const log_id_t mLogId;
38 const uid_t mUid;
39 const pid_t mPid;
Mark Salyzynb992d0d2014-03-20 16:09:38 -070040 const pid_t mTid;
Mark Salyzyn0175b072014-02-26 09:50:16 -080041 char *mMsg;
Mark Salyzynab0dcf62015-03-16 12:04:09 -070042 union {
43 const unsigned short mMsgLen; // mMSg != NULL
44 unsigned short mDropped; // mMsg == NULL
45 };
Mark Salyzynf7c0f752015-03-03 13:39:37 -080046 const uint64_t mSequence;
Mark Salyzyn0175b072014-02-26 09:50:16 -080047 const log_time mRealTime;
Mark Salyzynf7c0f752015-03-03 13:39:37 -080048 static atomic_int_fast64_t sequence;
Mark Salyzyn0175b072014-02-26 09:50:16 -080049
Mark Salyzynab0dcf62015-03-16 12:04:09 -070050 // assumption: mMsg == NULL
51 size_t populateDroppedMessage(char *&buffer, bool privileged);
52
Mark Salyzyn0175b072014-02-26 09:50:16 -080053public:
Mark Salyzyn7e2f83c2014-03-05 07:41:49 -080054 LogBufferElement(log_id_t log_id, log_time realtime,
Mark Salyzynb992d0d2014-03-20 16:09:38 -070055 uid_t uid, pid_t pid, pid_t tid,
56 const char *msg, unsigned short len);
Mark Salyzyn0175b072014-02-26 09:50:16 -080057 virtual ~LogBufferElement();
58
59 log_id_t getLogId() const { return mLogId; }
60 uid_t getUid(void) const { return mUid; }
61 pid_t getPid(void) const { return mPid; }
Mark Salyzynb992d0d2014-03-20 16:09:38 -070062 pid_t getTid(void) const { return mTid; }
Mark Salyzynab0dcf62015-03-16 12:04:09 -070063 unsigned short getDropped(void) const { return mMsg ? 0 : mDropped; }
64 unsigned short setDropped(unsigned short value) {
65 if (mMsg) {
66 free(mMsg);
67 mMsg = NULL;
68 }
69 return mDropped = value;
70 }
71 unsigned short getMsgLen() const { return mMsg ? mMsgLen : 0; }
Mark Salyzynf7c0f752015-03-03 13:39:37 -080072 uint64_t getSequence(void) const { return mSequence; }
73 static uint64_t getCurrentSequence(void) { return sequence.load(memory_order_relaxed); }
Mark Salyzyn0175b072014-02-26 09:50:16 -080074 log_time getRealTime(void) const { return mRealTime; }
75
Mark Salyzynf7c0f752015-03-03 13:39:37 -080076 static const uint64_t FLUSH_ERROR;
77 uint64_t flushTo(SocketClient *writer);
Mark Salyzyn0175b072014-02-26 09:50:16 -080078};
79
80#endif